Nikolai Kozlov—known as the Machine in the boxing ring—was ruthless. He was an underground boxer in an illegal ring. He was known for his unbeatable streak.

He was cold and stoic outside of the ring too. He was a giant—six foot eight, pure muscle, and broad. Tattoos covered his hands, arms, torso, and neck. He was terrifyingly gorgeous.

However, his pretty little wife was the only one who could bring out his soft and loving side. He was overprotective of her and obsessed with her.